<!DOCTYPE html>
<html lang="zh-cn">
    <head>
        <meta charset="UTF-8"/>
        <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
        <title>Document</title>
        <style>
            .spinner {
              width: 40px;
              height: 40px;
              margin: 100px auto;
              background-color: #333;
             
              border-radius: 100%; 
              -webkit-animation: scaleout 1.0s infinite ease-in-out;
              animation: scaleout 1.0s infinite ease-in-out;
            }
             
            @-webkit-keyframes scaleout {
              0% { -webkit-transform: scale(0.0) }
              100% {
                -webkit-transform: scale(1.0);
                opacity: 0;
              }
            }
             
            @keyframes scaleout {
              0% {
                transform: scale(0.0);
                -webkit-transform: scale(0.0);
              } 100% {
                transform: scale(1.0);
                -webkit-transform: scale(1.0);
                opacity: 0;
              }
            }
        </style>
    </head>
    <body>
        <h1>使用 CSS3 实现超炫的 Loading（加载）动画效果</h1>
        <p><a href="http://www.cnblogs.com/lhb25/archive/2013/12/28/loading-spinners-animated-with-css3.html">来源</a></p>
        <div class="spinner"></div>

    </body>
</html>